FileForums - Best Compression Methods for 'Specific' Games. Q&A

What is the best way to compress unity game for better ratio ? I tried the unity plugin but never seems to get anything extra with that, don't know where is the issue

KaktoR

17-09-2025 08:06

Quote:

Originally Posted by Dunnowho69 (Post 508583)

What is the best way to compress unity game for better ratio ? I tried the unity plugin but never seems to get anything extra with that, don't know where is the issue

bundle files are usually compressed with lz4hc (mostly level 12). But tbh I don't have compressed any unity game since months.

Example "Universe Sandbox 2" (because I have installed it right now as the only unity engine game).

Code:

Universe Sandbox x64_Data\StreamingAssets\aa\StandaloneWindows64\defaultpersistent_assets_all.bundle

Code:

Streams: 2401 / 2401

Time: 00:00:02 (CPU 00:00:15)



Size: 248 MB >> 326 MB

Used unity plugin with lz4hc,l12 setting and lz4 library 1.9.4.

dixen

17-09-2025 08:32

Quote:

Originally Posted by KaktoR (Post 508581)

Sample.

https://drive.google.com/file/d/1ozY...ew?usp=sharing

KaktoR

17-09-2025 08:49

Looks like lzo

I don't know really much about lzo so this could be false positives. Someone else has to check

KaktoR

17-09-2025 09:31

Quote:

Originally Posted by dixen (Post 508580)

What decompression method for DAT TCU?

https://www.patreon.com/posts/crew-offline-138995143

Dunnowho69

17-09-2025 10:27

Quote:

Originally Posted by KaktoR (Post 508584)

Code:

Universe Sandbox x64_Data\StreamingAssets\aa\StandaloneWindows64\defaultpersistent_assets_all.bundle

Code:

Streams: 2401 / 2401

Time: 00:00:02 (CPU 00:00:15)



Size: 248 MB >> 326 MB

Used unity plugin with lz4hc,l12 setting and lz4 library 1.9.4.

Does the plugin not work on .resS , .assets ,.resouce files ? I was trying it on a game that doesn't have .bundle file, maybe that's why it didn't work. Anyway thanks for the help :D

Masquerade

17-09-2025 11:11

^^
resS and assets files have no compression.

.resource files are either FMOD audio or videos.

The only file that is compressed which is in the <game name>_Data folder is data.unity3d.

JustFun

19-09-2025 20:50

Tom Clancy's Splinter Cell: Chaos Theory
Ripped: Foreign Languages, Versus Mode

For Videos use:

Code:

xtool:c1792mb:mbik+bcm

For Sounds use:

Code:

msc_tak+srep_new:490g+bcm

For rest of the files use:

Code:

srep_new:490g+lolz

------------------------------------------------------------------------------------------

Game size: 2.95 GB
Compressed game size: 1.67 GB

JustFun

19-09-2025 21:10

Tom Clancy's Splinter Cell
Ripped: Foreign Languages

For Videos use:

Code:

xtool:c1792mb:mbik+bcm

For Sounds use:

Code:

msc_tak+srep_new:490g+bcm

For rest of the files use:

Code:

srep_new:490g+lolz

------------------------------------------------------------------------------------------

Game size: 1.61 GB
Compressed game size: 952 MB

JustFun

19-09-2025 23:37

Far Cry 3 [Complete, Incl. DLC]

For Sounds use:

Code:

oggre+srep_new:490g+bcm

For everything else use:

Code:

bpk+xtool:c32mb:mfc3+srep_new:490g+lolz

------------------------------------------------------------------------------------------

Game size: 8.25 GB
Compressed game size: 4.5 GB

L0v3craft

24-09-2025 01:02

Hi guys. I'm trying to compress the game "WUCHANG: Fallen Feathers" v1.6 (179243).

It has two pak files (one is 41.6GB and the other one 14GB).

They are encrypted but not at all seems, because simply using srep+lolz the compression ratio is very good.

So I have used srep+lolz on all game files, compressed from 56.2GB to 18.4GB.

Another repacker (Elamigos) compressed the same game version (I compared the hashes of all game files) but his repack size is 17.5GB. He included also the soundtrack in the compression (so additional 137MB of mp3).

So I opened his archive and he used like me simply srep+lolz:

https://t1.pixhost.to/thumbs/8931/643855110_1.png

https://t1.pixhost.to/thumbs/8931/64...2_immagine.png

Now I don't think at all it is about some parameter of lolz or srep, because my repacks and his repacks usually are the same and in some case I compress a little better. In many cases we both compressed only using srep+lolz and no difference in final size.

My srep parameters: srep64 -m3f -a2

My lolz parameters: -d256mb -dtb1 -mtt1 -tt4 -mt10 -mc1023

Someone can help me to understand, please? Thanks.

KaktoR

24-09-2025 01:28

aes encryption is used.

Try xtool ue plugin with key and srep+lolz

L0v3craft

24-09-2025 02:34

Quote:

Originally Posted by KaktoR (Post 508619)

aes encryption is used.

Try xtool ue plugin with key and srep+lolz

I found the password for his archive and I used that password to open it with Freearc. Freearc is showing exactly the method he used (like me srep+lolz). And as confirmation I have installed his repack monitoring the installation from the task manager and XTool is not running, only srep and lolz:

https://t1.pixhost.to/thumbs/8933/64...5_immagine.png

However I tried what you suggested with the plugin "unrealengine_R13"":

XTool v0.8.9 here, only testing the decryption part and it stucks at some point:

https://t1.pixhost.to/thumbs/8933/64...ool-stucks.png

I tried also adding zlib+reflate after the key and it finds many more streams but stucks at the same point and anyway as you can see the size is not increasing, maybe the streams found are very small:

https://t1.pixhost.to/thumbs/8933/64...ib-reflate.png

this is with XTool v0.7.9, it doesn't stuck but it finds only 13 streams and I don't think this decryption can give some benefit:

https://t1.pixhost.to/thumbs/8933/64...ool-v0-7-9.png

I guess the plugin "unrealengine_R13" is not compatible with these pak files format. I tried also extracting them with quickbms and "unreal_tournament_4_0.4.27e_paks_only.bms" but it is not able to decompress all the files...

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